Down oven
The act of entrapping noxious fart(s) underneath a down comforter, which allows for the build up of odor until the comforter is lifted by an unsuspecting partner; releasing the aforementioned odor into their face. In effect a time lapsed or extended Dutch oven.
I had been farting sporadically for an hour or so, when I rolled over and lifted the comforter and he realized the full force of my down oven.